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Dong Z, Li Z, Hu P, Guo T, Zhang P, Zhu C. Copper-Catalyzed Tandem Cyclization/Chalcogenation with Elemental S 8/Se: Concise Synthesis of 3-(β-Hydroxychalcogen)benzofurans. J Org Chem 2024; 89:9641-9646. [PMID: 38910296 DOI: 10.1021/acs.joc.4c00077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
A novel copper-catalyzed cyclization/chalcogenation of o-alkynylphenols with epoxides and elemental S8/Se was developed for the synthesis of a 3-chalcogen-benzofuran architecture in a domino process with no intermediate isolation or purification. Various sensitive functional groups were compatible at room temperature and furnished chalcogenation derivatives in moderate to good yields.
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Affiliation(s)
- Zhe Dong
- Institute for Food Control, National Institutes for Food and Drug Control, Beijing 100061, P. R. China
| | - Zhonghui Li
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Penghua Hu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Tao Guo
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Panke Zhang
- Green Catalysis Center, College of Chemistry, Henan Advanced Institute of Technology, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Congjun Zhu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
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Rani P, Chahal S, Singh R, Sindhu J. Pushing Boundaries: What's Next in Metal-Free C-H Functionalization for Sulfenylation? Top Curr Chem (Cham) 2024; 382:13. [PMID: 38607428 DOI: 10.1007/s41061-024-00460-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 03/15/2024] [Indexed: 04/13/2024]
Abstract
The synthesis of thioether derivatives has been explored widely due to the potential application of these derivatives in medicinal chemistry, pharmaceutical industry and material chemistry. Within this context, there has been an increasing demand for the environmentally benign construction of C-S bonds via C-H functionalization under metal-free conditions. In the present article, we highlight recent developments in metal-free sulfenylation that have occurred in the past three years. The synthesis of organosulfur compounds via a metal-free approach using a variety of sulfur sources, including thiophenols, disulfides, sulfonyl hydrazides, sulfonyl chlorides, elemental sulfur and sulfinates, is discussed. Non-conventional strategies, which refer to the development of thioether derivatives under visible light and electrochemically mediated conditions, are also discussed. The key advantages of the reviewed methodologies include broad substrate scope and high reaction yields under environmentally benign conditions. This comprehensive review will provide chemists with a synthetic tool that will facilitate further development in this field.
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Affiliation(s)
- Payal Rani
- Department of Chemistry, College of Basic Sciences & Humanities, Chaudhary Charan Singh Haryana Agricultural University (CCS HAU), Hisar, Haryana, 125004, India
| | - Sandhya Chahal
- Department of Chemistry, College of Basic Sciences & Humanities, Chaudhary Charan Singh Haryana Agricultural University (CCS HAU), Hisar, Haryana, 125004, India
| | - Rajvir Singh
- Department of Chemistry, College of Basic Sciences & Humanities, Chaudhary Charan Singh Haryana Agricultural University (CCS HAU), Hisar, Haryana, 125004, India
| | - Jayant Sindhu
- Department of Chemistry, College of Basic Sciences & Humanities, Chaudhary Charan Singh Haryana Agricultural University (CCS HAU), Hisar, Haryana, 125004, India.
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Guo T, Hu P, Liu Y, Zhang P, Zhao Y, Zhu C. Ketosulfonylmethylenation and sulfonylethyleneation of imidazoheterocycles with dimethylformamide as a methylene source. Chem Commun (Camb) 2023; 59:12455-12458. [PMID: 37781868 DOI: 10.1039/d3cc03850e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
A hitherto unreported ketosulfonylmethylenation occurring at the C-3 position of imidazoheterocycles, with dimethylformamide as the methylene source was described. Using CoCl2·6H2O or Fe(acac)3 as efficient and inexpensive catalysts, some important biologically active methylenated compounds were prepared, with high efficacy, favorable functional group compatibilities, and a broad substrate scope.
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Affiliation(s)
- Tao Guo
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Penghua Hu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Yu Liu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Panke Zhang
- Green Catalysis Center, College of Chemistry, Henan Advanced Institute of Technology, Zhengzhou University, Zhengzhou 450001, PR China
| | - Yunhui Zhao
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P. R. China
| | - Congjun Zhu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
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Xia JH, Chen Q, Yuan JW, Shi WS, Yang LR, Xiao YM. Selectfluor-mediated tandem cyclization of enaminones with diselenides toward the synthesis of 3-selenylated chromones. RSC Adv 2023; 13:26948-26959. [PMID: 37692339 PMCID: PMC10486202 DOI: 10.1039/d3ra05246j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 09/04/2023] [Indexed: 09/12/2023] Open
Abstract
A practical and metal-free approach for the regioselective selenation of chromones employing Selectfluor reagent under mild conditions is described. The developed method is suitable for a wide substrate scope and affords 3-selenylated chromones in good to excellent yield with high selectivity. An ionic mechanism is proposed for this transformation. Furthermore, the application of potassium thiocyanate with enaminones for the synthesis of thiocyano chromones in this transformation is also successful.
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Affiliation(s)
- Ji-Hong Xia
- ENOVA Pharmaceutical Research (Nanjing) Co. Ltd Nanjing 210033 P. R. China
| | - Qian Chen
- School of Chemistry & Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Jin-Wei Yuan
- School of Chemistry & Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Wei-Shuo Shi
- School of Chemistry & Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Liang-Ru Yang
- School of Chemistry & Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Yong-Mei Xiao
- School of Chemistry & Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
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Lin Y, Wan JP, Liu Y. Cascade in Situ Iodination, Chromone Annulation, and Cyanation for Site-Selective Synthesis of 2-Cyanochromones. J Org Chem 2023; 88:4017-4023. [PMID: 36862999 DOI: 10.1021/acs.joc.3c00206] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
A facile cascade reaction for the site selective synthesis of 2-cyanochromones is described. By using simple o-hydroxyphenyl enaminones and potassium ferrocyanide trihydrate (K4[Fe(CN)6]3·3H2O) as starting materials and I2/AlCl3 as promoters, the products are furnished via tandem chromone ring formation and C-H cyanation. The in situ formation of 3-iodochromone and a formal 1,2-hydrogen atom transfer (HAT) process account for the unconventional site selectivity. In addition, the synthesis of 2-cyanoquinolin-4-one has been realized by employing corresponding 2-aminophenyl enaminone as substrate.
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Affiliation(s)
- Yan Lin
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Jie-Ping Wan
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Yunyun Liu
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China.,International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
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Guo T, Bi L, Shen L, Wei Q, Zhu C, Zhang P, Zhao Y. Selective oxidative β-C-H bond sulfenylation of tetrahydroisoquinolines with elemental sulfur. Org Biomol Chem 2022; 21:127-131. [PMID: 36484417 DOI: 10.1039/d2ob01976k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this article, a convenient and efficient KIO3-promoted oxidative sulfenylation at the β-position of tetrahydroisoquinolines and subsequent aromatization in the presence of elemental S8 is presented. The reaction proceeds with moderate to good yields via a double C-S formation process. A wide range of structurally diverse 4-sulfenylisoquinolines/3-sulfenylpiperidine were synthesized with excellent functional group tolerance and high efficiency.
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Affiliation(s)
- Tao Guo
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China.
| | - Lei Bi
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China.
| | - Lu Shen
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China.
| | - Quanhong Wei
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China.
| | - Congjun Zhu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China.
| | - Panke Zhang
- Green Catalysis Center, College of Chemistry, Henan Advanced Institute of Technology, Zhengzhou University, Zhengzhou 450001, PR China.
| | - Yunhui Zhao
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P. R. China.
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